Model #FRT21TNCW6 FRIGIDAIRE Top-Mount Refrigerator

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Refrigerator not cooling well, perhaps freezer too FRT21TNCW6

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Dezeray S -
August 07, 2013

Hello glad to help.  Thank You for choosing Sears

I am sorry and do understand your frustration when the refrigerator isn't running as well as it should.

I see you were checking the right things such as the door gasket seals and the motor running.   Very smart.  After you have checked all that and the temperature is the problem.   I highly recommend getting the temperature control for the refrigerator.  

How to check for thermostat/temperature control:

1.  Check the easiest and most common potential causes first, which is the best course of action in any troubleshooting case. With a freezing refrigerator, this means checking the thermostat itself to see if it is set at the right temperature.

Sometimes, other family members may accidentally turn the dial, so just make sure that the dial is not turned to the coldest setting. If the setting is correct and you are still having your foods frozen, then you may have to troubleshoot the workings of the thermostat.

2.  Unplug your refrigerator. Next, locate the control panel where the thermostat is located and remove all of the items near it so you can work.

The thermostat is located directly behind the dial. You may need the flashlight to help you see inside the refrigerator.

3.  Remove the plastic cover that protects the controls. Some covers are screwed into place while others are held in place by plastic clips. Depending on your make and model refrigerator, you may have to first remove the dial before you can take the cover off.

4.  Turn the dial to the coldest setting. Remove the two leads (wires) on the thermostat.

Note: It helps to write down which lead goes where for when it's time to replace everything.

5.  Set the volt-ohm multimeter to RX1 and probe the terminals. By "probe," I mean touch one of the multimeter's probes to one terminal on the thermostat and the other probe to the other terminal.

You should be getting a reading of zero. If you get a zero reading, then move on to Step 6. If you do not get a zero reading, then remove the thermostat and take it to an appliance store for a replacement.

6.  Remove the thermostat from the refrigerator entirely. Set the dial on the thermostat to the warmest setting and place the thermostat in a working freezer for 30 minutes.

After the 30 minutes are up, reprobe the terminals and look for a reading of infinity. If you get the infinity reading, then the thermostat is fine. Simply reinstall it, plug the refrigerator back in and look for another cause of your freezing problem, like dirty coils.

Temperature control for model FRT21NCW6

Good luck.   If you have further questions please let me know.
Thanks for choosing Sears

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Larry L -
Sears Technician
August 07, 2013
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